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https://github.com/pydata/xarray/issues/1522#issuecomment-325415311 https://api.github.com/repos/pydata/xarray/issues/1522 325415311 MDEyOklzc3VlQ29tbWVudDMyNTQxNTMxMQ== 6213168 2017-08-28T17:12:51Z 2017-08-28T17:17:09Z MEMBER

Given this: ``` def kernel(): print("Kernel invoked!") return numpy.array([100, 200])

data = dask.array.Array(name='foo', dask={('foo', 0): (kernel, )}, chunks=((2,),), dtype=float) This correctly computes the coord once: ds = xarray.Dataset(coords={'z': ('z', data)}) While this computes it twice: ds = xarray.Dataset() ds.coords['z'] = ('z', data) ```

 
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